On Dedekind’s problem: the number of isotone Boolean functions. II
On Dedekind’s problem: the number of isotone Boolean functions. II
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关于戴德金德问题:等调布尔函数 II 的数量。
DOI:
10.1090/s0002-9947-1975-0382107-0
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发表时间:
1975
影响因子:
1.3
通讯作者:
G. Markowsky
中科院分区:
文献类型:
--
作者:
D. Kleitman;G. Markowsky
It is shown that 0(n), the size of the free distributive lattice on n generators (which is the number of isotone Boolean functions on subsets of an n element set), satisfies [n1 i (n) < 2(1 +0(1og n/n))([ n/21) This result is an improvement by a factor V/n in the 0 term of a previous result of Kleitman. In the course of deriving the main result, we analyze thoroughly the techniques used here and earlier by Kleitman, and show that the result in this paper is "best possible" (up to constant) using these tech-